Question

Electronic This assignment requires plotting. Your plots should be to scale and neat. plotting is fine. Make sure all of your plots have "square" scales to appropriately represent shear strength and Mohr circles. A set of three direct shear tests was performed on a compacted sand. The effective normal stress and the shear stress at failure from the three tests are provided in the following table. Effective Normal 500 1000 2000 Shear Stress at Failure (psf) 385 750 1510 Specimen Stress (psf) 1. Interpretation of direct shear test results (7 pts) Plot the three data points (A, B, and C) and determine the effective stress friction angle, ', for the soil a. b. If you decide to perform another test with an effective normal stress of 1500 psf, what do you predict the shear stress at failure will be? One zone of an embankment dam will be built from the sand tested in Problem 1. At Point P in the dam, the total major principal stress is 4773 psf and the total minor principal stress is 1750 psf. The pore water pressure is 750 psf

Answer 1

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